Smoking pipe



P. NADELSON May 5, 1953 SMOKING PIPE Filed May 25, 1950 a o 0 INV NTUR. G Qing/@fwn 41,1 d f y ///zfam/EY `non-burning substance;

Patented May 5, 1953 `UNITED S TAT PATENT 'OFFICE "1 Claim.

'The present invention relates to smoking pipes tand 'more particularly to a smoking pipe having' an interchangeable innerbowl.

Smoking pipes, Avhaving interchangeable 'inner bowls are known in the art, but lit 4is the object of the present invention 4to provide va smoking pipe of 4this type which 'has many additional advantages not present .in smoking pipes of this type heretofore in use and which overcomes many :of the disadvantages inherent smoking pipes of this type as were heretofore in use.

lt is 'an 'ob-ject of the present invention to provide a smoking pipe that needs no breaking in, does not heat up excessively, will not burn through, .and which is easy to clean. A `smoking pipe embodying 'the present invention will have an interchangeable inner bowl constructed oi a thus eliminating the necessity for breaking in and eliminating .any danger of having the bowl 'burn through.

ln `smoking pipes with removable bowls ras were heretofore known, one `major disadvantage Ilias been the specic means or lack of means ior insuring an air tight nt between the inner and outer bowl. As can be readily appreciated this 'is necessary in order to enable the pipe to draw properly, otherwise air would be drawn between the outer shell and inner bowl, lessening or :completely destroying .the 4air flow through. the

burning tobacco. Threads on wood and ceramics are diiiicult to make with any degree of accuracy to insure interchangeability wear quickly. Cork rings were employed to insure a proper seal, but wood and cork parts swell and become distorted when subjected to repeated heating and cooling, especially when in the presence of moisture. The cork seals had a tendn ency to stick and tear which was an additional objection to their use. In a pipe embodying the present invention, the seal is perfected by placing a flat metallic surface over a fiat ceramic surface, thus always insuring an adequate and positive seal.

It is also the object of the present invention to provide a smoking pipe in which the outer bowl will remain cool. To this end, the pipe is so constructed that the inner bowl is nowhere in direct contact with the outer bowl. The inner bowl is seated in a metal ring which acts as a conductor for the heat and allows the heat to be dissipated into the atmosphere.

All smokers oi pipespermit a smail amount of saliva to enter into the bowl through the stem. The amount of saliva thus deposited varies with the type of smoker, but it is always present. The saliva combines vwith the moisture in the tobacco to create in the bottom ofthe bowl, `a tarry goo 'and a wet heel that cannot burn and which must be discarded. To avoid this undesirable consequence, the -inner bowl, which may be made or an absorbent ceramic, is coated on'the portion of its outside surface, which is below the smoke hole, with a glaze or other coating material which will lseal the pores, and thus prevent it 'from absorbing any moisture from the outside. The bottom of the inner bowl is spaced l.from vthe bottom of the outer bowl to permit the insertion of some absorbent material such as blotting palper- 'These and other objects and advantages oithe present invention will be more readily apparent from the following drawing and description of one lspecific embodiment of the `present invention, Vin which drawing:

Fig. 1 is a `plan view of a smoking pipe einbodying the present invention; and

Fig. 2 'is an enlarged exploded side view partia-lly broken away.

A smoking pipe embodying the present invention has an outer bowl l@ which is of the usual formation having an extension il to form the base of a stem, and a removable stem portion Iii.

The inner bowl is detachable from the outer bowl ill 'and is held inoperative position by an cuter ring I4, which is threaded onto the inner ring l5. The inner ring i5 is secured to the outer bowl ill, preferably by means of cement. It can therefore be seen that the inner ring will be permanently and tightly secured to the outer bowl Hl. This tight t is secured by having a flange portion i5 of the inner ring I5 ex tending downwardly and bearing against the inner surface of the outer shell lll. The lower part Ilia of the flange tapers out and terminates in a substantially thin edge.

The outer bowl ill may be made of any suitable material such as wood or plastic, and the inner bowl It may be made of any material, customarily used for this purpose, such as clay, ceramic, or artificial meerschaum. The body portion Il of the inner bowl is adapted to extend down into the outer shell but is of such size that it will neither touch the sides nor the bottom of the outer shell i0. The upper rim portion IS of the inner bowl i3 has a slanted face I9 which is adapted to it against the similarly slanted face 20, of the inner ring l5. The tace I9 is wider than the face 20, however, in order to insure that the body portion I1 of the inner bowl I3 will not be pinched when the outer ring I4 is screwed onto the inner ring I5. The inner ring I5 has external threads 2l which engage the internal threads 22 of the ring I. The outer ring I4 has a ange 23 extending around the top edge thereof and forming the periphery of a large opening 24 which is sub stantially of the same diameter as the inner diameter of the upper edge of the inner bowl I3. The undersurface 25 of the flange 23 engages the upper surface 26 of the inner bowl i3. These surfaces are machined absolutely fiat in order to form an air-tight seal between the bowl i3 and the outer ring I4. The outer surface of the outer ring I4 may be knurled so that it may be easily grasped to screw it on or to screw it off.

The inner bowl I3 is provided with an opening 21 to permit the passage of air and smoke. The outer surface of the bottom of the inner bowl I3 is coated with a glaze or other coating material which will seal the pores. This prevents any absorption of moisture that may be present in the bottom of the outer bowl Hl. The area covered by this glaze is indicated by a line 28.

If it is desirable, the inner bowl I3 may be made substantially shallower than the outer bowl i0 and the space between the bottom of the inner bowl I3 and the bottom of the inside of the outer bowl I0 may be lled with some absorbent material such as blotting paper or tobacco in order to absorb any saliva that may collect in the outer bowl.

It will be apparent from the above that the inner bowl I3 may readily be removed from the outer bowl I0 by simply unscrewing the outer ring I4 from the inner ring I5 and lifting the inner bowl I3 out, yet the inner bowl is securely held in position when the pipe is being used. The inner and outer rings are preferably made of a light weight metal alloy and since these two members are the only threaded portions of the pipe the threads may be machined accurately and will not soon become worn out or be deformed. A pressure type seal is provided in order that the pipe may draw properly by having the two surfaces 26 and 25 bear against each other. It will thus be seen that no cork ring or other similar sealing ring is necessary, said sealing rings being undesirable since they stick and break and otherwise become fouled from tar and other residues of smoking.

It is also apparent from the above, that the inner bowl I3 nowhere comes in direct contact with the outer shell I0. It is securely held between the two metallic rings I4 and I5. These rings carry the heat upward and outward in its normal direction dissipating it before the outer bowl can become really hot.

I claim:

A smoking pipe comprising an inner bowl of porous ceramic material and an outer bowl having the usual stem portion, a metal ring having a depending portion permanently cemented to the inner upper surface of said outer bowl, said metal ring having a portion thereof externally threaded, the inner bowl having an enlarged collar section at its upper periphery, said collar section having its under surface beveled to an inclined conical surface of not less than 45 degrees, the inner surface of the metal ring having a corresponding degree of inclination so that the inner bowl will be matingly received thereby, the maximum horizontal outer diameter of the inner bowl below the metal ring being less than the inside diameter of the outer bowl to provide a space therebetween, and a metal cap ring in threaded engagement with said metal ring and having a iiange adapted to bear against the upper surface of the inner bowl.

PHILIP NADELSON.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 90,554 Kaldenberg May 25, 1869 311,469 Chadsey Feb. 3, 1885 375,140 Eccles Dec. 20, 1887 895,499 Russell Aug. 11, 1908 1,109,207 Di Bianca Sept. 1, 1914 1,542,838 Prophet June 23, 1925 1,628,649 Bittner May 17, 1927 1,862,443 Tuggle June 7, 1932 2,020,898 McDonald Nov. l2, 1935 2,068,598 Ellingswood Jan. 19, 1937 2,329,578 Andis Sept. 14, 1943 FOREIGN PATENTS Number Country Date 2,673 Great Britain of 1867 361,695 France Oct. 13, 1906 

